bpo-35054: Add yet more index entries for symbols. (GH-10121) (GH-10171)

(cherry picked from commit 913876d824d969f8c7431e8a9d4610a9a11a786e)

Co-authored-by: Serhiy Storchaka <storchaka@gmail.com>
diff --git a/Doc/library/fnmatch.rst b/Doc/library/fnmatch.rst
index abf9523..ecba4aa 100644
--- a/Doc/library/fnmatch.rst
+++ b/Doc/library/fnmatch.rst
@@ -16,6 +16,13 @@
 same as regular expressions (which are documented in the :mod:`re` module).  The
 special characters used in shell-style wildcards are:
 
+.. index::
+   single: * (asterisk); in glob-style wildcards
+   single: ? (question mark); in glob-style wildcards
+   single: [] (square brackets); in glob-style wildcards
+   single: ! (exclamation); in glob-style wildcards
+   single: - (minus); in glob-style wildcards
+
 +------------+------------------------------------+
 | Pattern    | Meaning                            |
 +============+====================================+